Iron core clamping system for reducing iron core loss and noise

Abstract

The invention relates to an iron core clamping system capable of reducing iron core loss and noise. The iron core clamping system capable of reducing iron core loss and noise comprises a drawstring plate, one end of the drawstring plate is welded with a drawstring connecting plate, one end of the drawstring connecting plate is connected with a screw rod, and one end of the screw rod is connected with a nut assembly; the two ends of the drawstring plates are welded with drawstring connecting plates, and one clamping system at least comprises two groups of drawstring plates; the nut assembly comprises a thick nut and a thin nut; the surface of the screw rod is sleeved with an insulating washer, and the thin nut is arranged between the thick nut and the insulating washer; according to the iron core clamping system capable of reducing the iron core loss and noise, the problem that the drawstring clamping force generated by the torque cannot be accurately and quantitatively controlled is solved, the magnitude of the iron core clamping force can be directly and quantitatively controlled, and the purpose of reducing the iron core loss and the noise level is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of transformer structures, and particularly relates to a core clamping system for reducing core loss and noise. Background Art

[0002] The clamping force of the core of a large transformer has the most important and direct influence on the core loss and noise level of the transformer. If the clamping force is too small, the laminations will be loose and vibrate, resulting in an increase in amplitude, loss, and noise. If the clamping force is too large, the core laminations are prone to form waves, increasing the loss and noise. There is an optimal range value for the clamping force of the core to keep the loss and noise at a low level. Therefore, the clamping force of the core should be reasonably controlled within the optimal range.

[0003] The tightening of the tie rod is often carried out by applying torque with a torque wrench. The torque has a corresponding relationship with the clamping force along the direction of the screw rod, and it is greatly affected by the torque tightening coefficient. The torque tightening coefficient is related to the surface quality of the machining and the lubrication procedure, and its value cannot be accurately quantified and controlled, with a large dispersion. Therefore, the method of applying torque cannot accurately quantify and control the clamping force. Summary of the Invention

[0004] The purpose of the present invention is to provide a core clamping system for reducing core loss and noise with a simple structure and reasonable design to solve the above problems.

[0005] The present invention achieves the above purpose through the following technical solutions:

[0006] A core clamping system for reducing core loss and noise, the system includes a tie plate, one end of the tie plate is welded with a tie connecting plate, one end of the tie connecting plate is connected with a screw rod, and one end of the screw rod is connected with a nut assembly.

[0007] As a further optimized solution of the present invention, tie connecting plates are welded at both ends of the tie plate, and at least two groups of tie plates are included in one clamping system.

[0008] As a further optimized solution of the present invention, the nut assembly includes a thick nut and a thin nut.

[0009] As a further optimized solution of the present invention, an insulating washer is sleeved on the surface of the screw rod, and the thin nut is arranged between the thick nut and the insulating washer.

[0010] As a further optimized solution of the present invention, a through hole is provided on the surface of the screw rod.

[0011] As a further optimized solution of the present invention, the system further includes a pulling plate, and the side of the pulling plate is rotatably connected with a side fixing plate.

[0012] As a further optimization solution of the present invention, a clamping groove is provided on the surface of the side fixing plate, the screw rod is inserted into the clamping groove, a plug pin is arranged on the surface of the side fixing plate, and the plug pin penetrates through the side fixing plate and the through hole.

[0013] As a further optimization solution of the present invention, a fixing frame is arranged on the surface of the pulling plate, an adjusting rod is slidably connected in the fixing frame, one end of the adjusting rod is movably connected to the side fixing plate, and the angle between the side fixing plate and the pulling plate is adjusted by adjusting the position of the adjusting rod on the surface of the fixing frame.

[0014] As a further optimization solution of the present invention, a sliding groove is provided on the surface of the fixing frame, and the fixing frame is fixedly connected to the adjusting rod through a sliding groove connecting screw.

[0015] The beneficial effects of the present invention are as follows: The present invention solves the problem that the pulling belt clamping force generated by the torque cannot be accurately and quantitatively controlled. The size of the iron core clamping force can be directly quantitatively controlled, so as to achieve the purpose of reducing the iron core loss and noise level. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is an assembly schematic diagram of the iron core clamping system of the present invention;

[0017] Figure 2 is of the present invention Figure 1 side structure schematic diagram;

[0018] Figure 3 is a structural schematic diagram of the pulling belt clamping of the present invention;

[0019] Figure 4 is a structural schematic diagram of the pulling plate of the present invention.

[0020] In the figure: 1, pulling belt plate; 2, pulling belt connecting plate; 3, screw rod; 4, insulating washer; 5, thick nut; 6, thin nut; 7, pulling plate; 71, side fixing plate; 72, adjusting rod; 73, fixing frame. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following further describes the present application in detail with reference to the drawings. It is necessary to point out here that the following specific embodiments are only used to further illustrate the present application and cannot be understood as limiting the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application according to the above application content.

[0022] Embodiment 1

[0023] Reference Figures 1 to 3As shown in the structure, a core clamping system for reducing core loss and noise, the system includes a tension belt plate 1, one end of the tension belt plate 1 is welded with a tension belt connecting plate 2, one end of the tension belt connecting plate 2 is connected with a screw 3, and one end of the screw 3 is connected with a nut assembly.

[0024] Both ends of the tension belt plate 1 are welded with tension belt connecting plates 2, and at least two groups of tension belt plates 1 are included in one clamping system.

[0025] The nut assembly includes a thick nut 5 and a thin nut 6.

[0026] An insulating washer 4 is sleeved on the surface of the screw 3, and the thin nut 6 is arranged between the thick nut 5 and the insulating washer 4.

[0027] It should be noted that the upper and lower yokes of the core of this clamping system are clamped by multiple tension belts on both the inner and outer sides. The tension belt structure includes a tension belt plate 1, a tension belt connecting plate 2, a screw 3, an insulating washer 4, a thin nut 5, and a thick nut 6. One end of the tension belt connecting plate 2 is welded to the tension belt plate 1, and the other end is a threaded structure connected to the screw 3. The screw is connected to a special tool, and a pulling force along the direction of the screw 3 is applied. After the tension belt is tightened, the thin nut 5 and the thick nut 6 are tightened to lock the screw 3. The direction of the applied pulling force is the direction of the core clamping force. Ignoring the influence of the tightening coefficient of the screw 3, the core clamping force is accurately controlled;

[0028] This application solves the problem that the tension belt clamping force generated by the torque cannot be accurately and quantitatively controlled. The magnitude of the core clamping force can be directly and quantitatively controlled, achieving the purpose of reducing the core loss and noise level.

[0029] Embodiment 2

[0030] On the basis of the above-mentioned Embodiment 1, referring to Figure 4 As shown in the structure, a through hole is opened on the surface of the screw 3. The system further includes a pulling plate 7, and a side fixing plate 71 is rotatably connected to the side of the pulling plate 7.

[0031] A clamping groove is opened on the surface of the side fixing plate 71, the screw 3 is inserted into the clamping groove, and a pin is arranged on the surface of the side fixing plate 71, and the pin penetrates through the side fixing plate 71 and the through hole.

[0032] A fixing frame 73 is arranged on the surface of the pulling plate 7, an adjusting rod 72 is slidably connected in the fixing frame 73, one end of the adjusting rod 72 is movably connected to the side fixing plate 71, and the angle between the side fixing plate 71 and the pulling plate 7 is adjusted by adjusting the position of the adjusting rod 72 on the surface of the fixing frame 73.

[0033] A sliding groove is opened on the surface of the fixing frame 73, and the fixing frame 73 is fixedly connected to the adjusting rod 72 through a screw connected to the sliding groove.

[0034] In this embodiment, the angle of the side fixing plate 71 is adjusted to adapt to more forms of the screw 3.

[0035] It should also be supplemented that a corresponding housing structure is provided outside the iron core itself. After pulling the screw 3 to clamp the iron core, after tightening the tension belt, it is fixed through the nut assembly to prevent rebound.

[0036] In this embodiment, the through hole can be arranged behind the nut assembly without affecting the fixation after tightening.

[0037] In the present invention, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0039] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0040] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

[0041] The above-described embodiments merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as limiting the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several variations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A core clamping system for reducing core loss and noise, characterized in that: The system comprises a drawstring plate (1), one end of which is welded with a drawstring connecting plate (2), one end of which is connected with a screw rod (3), and one end of which is connected with a nut assembly; both ends of the drawstring plate (1) are welded with a drawstring connecting plate (2), and a clamping system comprises at least two groups of drawstring plates (1).

2. A core clamping system for reducing core loss and noise according to claim 1, characterized in that: The nut assembly comprises a thick nut (5) and a thin nut (6).

3. A core clamping system for reducing core loss and noise according to claim 2, characterized in that: An insulating washer (4) is sleeved on the surface of the screw rod (3), and the thin nut (6) is arranged between the thick nut (5) and the insulating washer (4).

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